Aging Check

Oxygen sensor 1 aging, checking

Special tools and equipment
- V.A.G1551 Scan Tool (ST) or VAG1552 mobile scan tool with VAG1551/3 adapter cable






- VAG1788/10 engine speed adjuster

Test conditions
- Coolant temperature at least 85°C. See display group 04, display field 3

Functional check
- Connect VAG1551 (VAG1552) Scan Tool (ST). [1][2]Reading and Clearing Diagnostic Trouble Codes
- Switch ignition on and press buttons -0- and -1- to insert "Engine Electronics" address word 01. Engine must be running at idle when performing this step.

Indicated on display

Rapid data transfer HELP
Select function XX

- Press buttons -0- and -4- to select "Basic Setting" function 04 and press -Q- button to confirm input.

Indicated on display

Basic setting
Input display group number XXX

Press buttons -0-, -3-, and -4- to input display group number 34 (034) and press -Q- button to confirm input

Indicated on display: (1-4 = display fields)

System in basic setting 34 ->
1 2 3 4

- Set engine speed at 2200-2800 RPM using VAG1788/10 engine speed adjuster.
- Maintain engine speed at 2200-2800 RPM until display in display field 4 jumps from "Test OFF" to "Test ON."
The Three Way Catalytic Converter (TWC) temperature in display field 2 at least 352.0°C.

- Check cycle duration in display field 3.
- Specified value: max. 2.20 seconds
- Maintain speed at to 2200-2800 RPM until specified value "B1-P1 OK" appears in display field 4.

Display Group 34:

If the specified values are obtained:
- Press -> button.
- Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
- Turn off ignition.

Continuation

If the specified values are not obtained:
- Perform road test in order to free oxygen sensor of possible residues and repeat test.

Observe the safety precautions when performing a road test. Technician Safety Information

If the specified values are still not obtained:
- Replace Heated Oxygen Sensor (HO2S) before Three Way Catalytic Converter.
- Check DTC memory. If necessary, repair any malfunctions and erase DTC memory.
Reading Diagnostic Trouble Codes
Clearing Diagnostic Trouble Codes

- Display readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
If DTC memory has been erased or the Engine Control Module (ECM) was disconnected from permanent battery (B+) voltage, generate the readiness code again. Monitors, Trips, Drive Cycles and Readiness Codes